I saw a lot of people running the wltpys 144001 on 3s and it takes it but saw one guy fry the esc. People are getting to 70-82kmh its just nuts fast like my kraton 4s. I think im going to stay 2s because i just plan to have fun and do minor bashing with it to remplace my a959 who was a bit dissapointing. Atm you can get a 20$ discount coupon on banggood code BGBF144001